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Bosch AH-24WP-R Data Sheet
1. Fire Alarm Systems | AHâ24 24 V Electronic Horns
AHâ24 24 V Electronic Horns
www.boschsecurity.com
u Costâeffective twoâwire design
u Selectable continuous tone or temporal (Code 3)
sound pattern synchronization
u Three fieldâselectable sound levels
u Weatherproof model available
u Low average current draw
These Wheelock horns offer tone choices of either
continuous horn or temporal pattern (Code 3) tone
when constant voltage from the fire alarm control
panel (FACP) is applied. Each tone has three
fieldâselectable volume levels.
These horns can be synchronized when used with the
SM (single) and DSM (dual) Synchronization Modules
or a compatible control panel. If not synchronized, the
temporal sound patterns might overlap and not be
distinctive.
Certifications and approvals
Cooper Wheelock, Inc. holds these Listings and
Approvals:
Region Certification
USA UL ULSZ: Audible Signal Appliance (UL464)
CSFM see our website
Canada ULC All models: ULSZC: Audible Signal Appli-
ances and Accessories, Fire Alarm
Installation/configuration notes
Compatible Products
The following products are compatible with the AHâ24
Horns:
Category Product ID Product Description
Control
Panels
D70221
Conventional FACP
D70242
Addressable FACP
D7024 Conventional FACP
D80241
Analog FACP
D91241
Addressable FACP
D10024A1
Analog FACP
FPD-70242
Addressable FACP
FPD-7024 Conventional FACP
FPA-1000 Analog Addressable FACPs
Modules SMâ12/24âR Synchronization module (red)
DSMâ12/24âR Dual synchronization module
(red)
2. RSSPâ241575WâFR Fixedâcandela retrofit strobe
plate
RSSPâ24MCWâFR Multiâcandela retrofit strobe
plate
RSSPâ24MCWHâFR Highâcandela retrofit strobe
plate
1
For synchronization, use the SM or DSM
Synchronization Modules. The synchronization module
must be set for 24 VDC operation. When used, the
D7022 must be set for 24 VDC operation.
2
When used with a D7039 Multiplex Expansion
Module, the FPD-7024 and D7024 become
addressable fire alarm control panels (FACPs).
Mounting Considerations
Use as Combination Appliance
Where combination appliances are required, the
AHâ24âR Horn can be used with the RSSPâ241575WâFR
Fixedâcandela, RSSPâ24MCWâFR Multiâcandela, or
RSSPâ24MCWHâFR Highâcandela Retrofit Strobe Plates
that are designed to meet or exceed the latest
requirements of NFPA 72, ANSI 117.0 and UL 1971.
The horns and retrofit strobe plates are also
compatible with the SBL2âR Retrofit Device Back Box.
Outdoor or Severe Environment Applications
For an outdoor application or a severe environment
(NEMA 3R) application, the AHâ24WP Weatherproof
Horn in combination with a WBBâR Weatherproof Back
Box must be mounted on a flat wall such that the wall
covers the entire rear surface of the back box. The
back box must have its drain holes pointed toward the
ground. The knockouts in the rear surface of the back
box must remain intact.
The knockout hole on top of the back box is sized for a
halfâinch conduit and matching connector. A proper
watertight conduit fitting must be used.
Indoor Applications
The AHâ24âR and AHâ24âW Horns are equipped with a
mounting plate that mounts on the indicated back
boxes for the indicated applications:
Conduit
Applications
Surface
Mounted
Flush
Mounted
Singleâgang âą
Doubleâgang âą âą
Fourâinch square âą âą
100âmm European âą âą
SHBB-R âą âą
The AHâ24WP Weatherproof Horn can be indoor
surfaceâmounted on a deep (>2.125 in. [5.4 cm]), four-
inch square back box.
Wiring
Notice
Do not use these horns in coded systems in which
the voltage is cycled on and off.
The input terminals accept wires with diameters
between 18 AWG and 12 AWG (ISO 0.75 mm2
and
4 mm2
).
Parts included
Quant. Component
1 Horn
1 Mounting Plate
1 Hardware pack
1 Literature pack
Technical specifications
Environmental Considerations
Relative Humidity: Up to 95%, nonâcondensing
Temperature (operating): +32°F to +120°F (0°C to +49°C)
Horn Ratings at 24 VDC
Continuous Horn
Reverberant dBA at 10 ft (3 m) per
UL464:
High: 91 dBA
Medium: 88 dBA
Low: 83 dBA
Temporal (Code 3) Horn
Reverberant dBA at 10 ft (3 m) per
UL464:
High: 87 dBA
Medium: 84 dBA
Low: 79 dBA
Notice
The sound output for the Temporal (Code 3)
mode is rated lower than in Continuous mode
because the time that the horn is off is averaged
into the sound output rating. When the horn
produces a tone in Temporal mode, its sound
pressure is the same as the Continuous mode.
Mechanical Properties
Dimensions (H x W x D): 4.125 in. x 4.125 in. x 1.25 in.
(10.5 cm x 10.5 cm x 3.2 cm)
Material: Molded plastic enclosure
2 | AHâ24 24 V Electronic Horns
3. Power Requirements
Current (maximum) VDC: High dBA: 80 mA
Medium dBA: 43 mA
Low dBA: 21 mA
Current (maximum) VFWR: High dBA: 90 mA
Medium dBA: 51 mA
Low dBA: 41 mA
Voltage (input) 24 VDC nominal; 16 VDC or FWR to
33 VDC or FWR
Ordering information
AHâ24âR 24 VDC Electronic Horn (red)
Red, twoâwire, 24 V electronic horns with three
fieldâselectable sound levels and continuous tone or
temporal (Code 3) sound patterns
Order number AH-24-R
AHâ24âW 24 VDC Electronic Horn (white)
White, twoâwire, 24 V electronic horns with three
fieldâselectable sound levels and continuous tone or
temporal (Code 3) sound patterns
Order number AH-24-W
AHâ24WPâR 24 VDC Weatherproof Electronic Horn (red)
Weatherproof, white, twoâwire, 24 V electronic horns
with three fieldâselectable sound levels and continuous
tone or temporal (Code 3) sound patterns
Order number AH-24WP-R
Accessories
BBâR Steel Back Box
Black, 10.2 cm (4 in.) square, 3.8 cm (1.5 in.) deep
Order number BB-R
DBBâR Steel Back Box (red)
8.6 cm (3.375 in.) square, 5.6 cm (2.1875 in.) deep
Order number DBB-R
NATPâR Trim Plate (red)
13.3 cm (5.25 in.) square, 2.1 cm (0.8125 in.) thick.
Not Available.
Order number NATP-R
NATP-W Trim Plate (white)
13.3 cm (5.25 in.) square, 2.1 cm (0.8125 in.) thick
Order number NATP-W
RPâR Retrofit Plate (red)
20.3 cm (8 in.) high, 14.9 cm (5.875 in.) wide.
Not Available.
Order number RP-R
SBL2âR Retrofit Device Back Box (red)
dimensions 27.8 cm (10.9 in.) x 15.5 cm (6.1 in.) x
4.3 cm (1.7 in.)
Not Available.
Order number SBL2-R
SFPâR Semiâflush Plate (red)
15.2 cm (6 in.) square by 0.8 cm (0.3125 in.) thick
Order number SFP-R
SHBBâR Shallow Surface Back Box (red)
12.7 cm (5 in.) square by 4 cm (1.56 in.) deep
Order number SHBB-R
SSBâ4 Ceiling Support Bridge
60.3 cm (23.75 in.) long by 16.5 cm (6.5 in.) wide
Order number SSB-4
WBBâR Weatherâresistant Back Box (red)
10.5 cm (4.125 in.) square by 5.1 cm (2 in.) deep
Order number WBB-R
3 | AHâ24 24 V Electronic Horns